The term "hydropower" is a common word used to generalize the many different means of utilizing the energy in flowing water, ranging from large hydroelectric power plants to systems that harness both tidal and wave power. Hydroelectric facilities provide approximately 25 percent of the world's electricity supply-with plants operating in 86 countries across the globe (Carless, Jennifer 1993). Hydroelectric dams produce electricity much more efficiently than other conventional sources (such as coal and nuclear) while also maintaining a
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showed last 75 words of 2800 total
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